Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 887 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) leaves (c) stem (d) roots
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) dark green (c) blue (d) pale yellow
4. 4.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) lemon juice (c) white paper (d) yeast
5. 5.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
6. 6.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the amount poured (b) the filter material (c) how clear the water is (d) the same muddy water
7. 7.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it is magnetic (c) it is cold (d) it can burn skin
8. 8.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) the ink is magnetic (c) it turned into air (d) dry juice is see-through
9. 9.True or false: cotton or cloth is needed for the muddy water filter. (a) False (b) True
10. 10.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
11. 11.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) it fills with soil (c) much less water (d) much more water
12. 12.True or false: fresh cream is needed for making butter. (a) False (b) True
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) it grows faster (d) the yeast is killed
16. 16.True or false: wet seeds in the dark sprouts in a few days. (a) True (b) False
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the light we look in (d) the turmeric paper
18. 18.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
19. 19.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) your best clothes (d) a white party dress
20. 20.True or false: melting ice is a change that cannot be undone. (a) True (b) False
21. 21.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a balloon (b) a jar with a tight lid (c) fresh cream (d) a timer
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
23. 23.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a small bottle (d) a comb
25. 25.🧺 Do we need a few days for sprouting seeds? (a) not needed (b) needed
26. 26.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a tray for spills (c) baking soda (d) a seed
27. 27.True or false: baking soda water is an acid. (a) True (b) False
28. 28.🪴 Which part of a plant does this job: hold up the leaves? (a) stem (b) roots (c) flower (d) leaves
29. 29.True or false: orange juice is neutral. (a) False (b) True
30. 30.🫧 What do you see when baking soda meets vinegar? (a) it glows in the dark (b) nothing at all (c) lots of fizzy bubbles (d) it turns to ice
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) turmeric powder (c) a piece of string (d) a spoon
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.🔍 Which is the odd one out? (a) time (b) warm water (c) vinegar (d) sugar
34. 34.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a clear plastic bag (c) a rubber band (d) a magnet
35. 35.🍞 Which of these is something yeast does not need? (a) sugar (b) sunlight (c) time (d) warm water
36. 36.True or false: vinegar keeps turmeric yellow. (a) True (b) False
37. 37.True or false: food colour does not dissolve in water. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) sunlight
39. 39.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True

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